Accessories Pressure Switches

Vickers®

Accessories

Pressure Switches S*307 Series Functional Symbol

Sectional Arrangement ST307-V2-AS-H2 example

ISO 4400 connector

Pressure switch symbol

2

3

2 3 1

Supply Normally closed Normally open

General Description A range of piston-operated pressure switches for general applications where an electrical signal is needed to indicate a given pressure condition in a hydraulic circuit. The microswitch is actuated by the operating plate of an adjustable loading spring. The spring load holds the operating plate against the switch until applied hydraulic pressure on a small piston forces the operating plate away from the switch to change over the switch contacts. The switch will reset when the hydraulic pressure falls by a small differential.

March 1996

Switches in three pressure adjustment ranges are available for panel or base mounting with G1/4I (BSPF) or SAE/UNF port connection, or for subplate mounting. Adjustment options are screwdriver or handknob (both with locking screw) or handknob with keylock. Pressure switches are supplied complete with an ISO 4400 (DIN 43650) type connector plug. Separate stacking adaptor blocks to ISO 4401 size 03 are available to allow pressure switches to be installed into compact stack assemblies using Vickers SystemStakTM valves (see catalog 2027).

P 1

Pin 1 Pin 2 Pin 3

Features and Benefits F Switching accuracy less than 1% of pressure setting F Low hysteresis F Suitable for AC or DC current F Galvanic gold-plated silver switch contacts for long life F Small, easy to install F Electrical protection to IEC 144 class IP65 F Select requirements from: 3 pressure ranges 3 adjustment types 3 mounting styles Locking screw and keylock options

GB-2166A

Model Code

For Pressure Switches

S * 307(-***) - (**-**-**) - *** (-*) 1

2

3

4

1 Hydraulic system connection T = Threaded pipe connection G = O-seal for subplate connection 2 Mounting Blank = Two tapped holes for base mounting (type T only) SCH = Panel mounting F = Subplate mounting 3 Type of adjustment Blank = Screwdriver slot with locking set screw V2 = Knurled handknob with locking set screw V2-AS-H2 = Knurled handknob with keylock

5

4 Pressure adjustment range 55 = 5 to 55 bar (73 to 797 psi) 150 = 20 to 150 bar (290 to 2175 psi) 350 = 20 to 350 bar (290 to 5075 psi) 5 Thread combinations: port/mounting bolt tappings B = G1/4I (BSPF) port and/or metric mountings ST307 models only: S = SAE 6 port and/or UNC mountings

For Stacking Adaptor Blocks

DGMP-3 - * - * -1 * 1

2

3

4

1 Valve/subplate mounting interface 3 = ISO 4401 size 03 (ANSI B93.7M, size D03)

3 Pressure switch mounting bolt tappings B = Metric S = UNC

2 Port connection to pressure switch P = Port P (at A end of block) A = Port A (at A end of block) B = Port B (at B end of block)

4 Design number, 10 series Subject to change. Installation dimensions unchanged for design numbers 10 to 19 inclusive.

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Operating Data

Pressure Switches Maximum pressure, all models

350 bar (5075 psi)

Pressure adjustment ranges

See model code position 4

Electrical data Current capacity Switching connections Connector plug (supplied) Protection (general)

See “Switching Capacity” below See “Functional Symbol” page 1 Female receptacle to ISO 4400 (DIN 43650) IEC 144 class IP65

Microswitch details Type Travel Contacts Protection

Electromechanical, double-throw 0,5 mm (0.020I) Refined silver, galvanic gold-plated IEC 144 class IP67; dustproof to DIN 40050

Switching repeatability

15 to 30 >30 to 50 >50 to 75 >75 to 125 >125 to 250

3.0 3.0 1.0 0.75 0.5 0.25

3.0 3.0 0.7 0.5 0.4 0.2

3.0 3.0 1.0 0.25 0.05 0.03

DC current

1.5 1.5 0.7 0.5 0.4 0.2

Y At normally closed (NC) and normally open (NO) contacts respectively.

3

(on rising presssure)

pressure diiferential (on falling pressure)

Min.

Return pressure differential

Hysteresis Diagrams The pressure differential between switching point (on rising pressure) and S*307- - -55 models switch reset point (on falling pressure) psi bar varies according to the switching point set pressure. 8 100 6 Switching Points 75 4 Switch operating point Average return 50 25

Average values Max./Min. limits Effective adjustment range

Max. limit Min. limit

2

0 0

Max.

5 0

10

73

20 200

30

40

400 Pressure setting

50

600

55

bar

798 psi

Reset pressures

Max.

Min.

Example 1 (“bar” units of pressure) Model S*307---150 set at 140 bar Max. reset pressure . . . . . . . . . . 134 bar Average reset pressure . . . . . . . 132 bar Min. reset pressure . . . . . . . . . . 130 bar At this level the return pressure differential may vary between 6 and 10 bar, the average being 8 bar.


S*307- - -150 models Av.

psi

Effective adjustment range

bar 16

200 150

12

100

8

50

4

Max. limit Min. limit

0 0

20 0

40

290 500


Example 2 (“psi” units of pressure) S*307- - -350 models Model S*307---150 set at 2000 psi psi bar Max. reset pressure . . . . . . . . . 1910 psi Average reset pressure . . . . . . 1880 psi 20 Min. reset pressure . . . . . . . . . 1860 psi 250 16 At this level the return pressure differential 200 may vary between approximately 90 and 12 150 140 psi, the average being 120 psi. 8 100 50

60

80

100

120

1000 1500 Pressure setting

140 150 bar 2000 2175 psi

Effective adjustment range

Max. limit

Min. limit

4

0 0

20 50 0 290

100

1000

4

150

200

250

2000 3000 Pressure setting

300

4000

350 bar 5075 psi

Installation Dimensions mm (inches)

Base Mounted Models, Blank at Model Code Position 2 With screwdriver adjustment and locking screw ST307-***-B ST307-***-S

3rd angle projection 114 (4.5) 60 (2.4)

13 (0.5) for plug removal

85 (3.4)

Adjustment screw

2 holes for mounting screws, tapped according to model code position 5 : B = M5 x 10 deep S = #10-24 UNC x 0.40 deep

B = G1/4 (1/4I BSPF) x 9 (0.35) deep. S = 9/16I-18UNF-2B x 0.50 deep. Max. fitting torque: 30 Nm (265 lbf in)

Pg11

40 (1.6)

Locking screw 2,5 (0.098) A/F

40 (1.6)

44 (1.7)

32 (1.25)

Hydraulic connection, tapped according to model code position 5 :

27 (1.0) A/F

86 (3.4)

With knurled handknob adjuster and locking screw ST307-V2-***-B ST307-V2-***-S Dimensions/data not shown are as for model above, as applicable.

Adjustment knob Locking screw 2,5 (0.098) A/F

With knurled handknob adjuster and keylock ST307-V2-AS-H2-***-B ST307-V2-AS-H2-***-S Dimensions/data not shown are as for model above, as applicable.

Key must be inserted and turned to allow adjustment. Adjustment not possible (knob spins freely) when key is removed.

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Models for Panel Mounting, “SCH” at Model Code Position 2

3rd angle projection

With screwdriver adjustment and locking screw ST307-SCH-***-B ST307-SCH-***-S

114 (4.5) 60 (2.4)

2 holes for mounting screws, tapped according to model code position 5 :

13 (0.5) for plug removal

B = M5 x 10 deep S = #10-24 UNC x 0.40 deep

Adjustment screw

40 (1.6)

B = G1/4 (1/4I BSPF) x 9 (0.35) deep. S = 9/16I-18UNF-2B x 0.50 deep. Max. fitting torque: 30 Nm (265 lbf in)

Pg11

85 (3.4)

Hydraulic connection, tapped according to model code position 5 :

Ø35 (1.4 dia)

Locking screw 2,5 (0.098) A/F 40 (1.6)

27 (1.0) A/F

15 (0.6)

44 (1.73) bolt circle dia.

86 (3.4)

With knurled handknob adjuster and locking screw ST307-SCH-V2-***-B ST307-SCH-V2-***-S Dimensions/data not shown are as for model above, as applicable.

Adjustment knob


With knurled handknob adjuster and keylock ST307-SCH-V2-AS-H2-***-B ST307-SCH-V2-AS-H2-***-S Dimensions/data not shown are as for model above, as applicable.


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3rd angle projection

Subplate Mounted Models, “F” at Model Code Position 2 With screwdriver adjustment and locking screw SG307-F-***-B SG307-F-***-S

100 (4.0)

13 (0.5) for plug removal 4 holes through, Ø5,5 (0.21 dia)F

Pg11

85 (3.4)

Adjustmen t screw

60 (2.4)

Mounting face: O-seal 7 (0.275) i/dia x Ø1,5 (0.059 dia) section, supplied

40 (1.6)

Locking screw 2,5 (0.098) A/F 40 (1.6)

61 (2.4)

44 (1.73) bolt circle dia. F Only two mounting bolts required, see Mounting Surface, this page. With knurled handknob adjuster and locking screw SG307-F-V2-***-B SG307-F-V2-***-S Dimensions/data not shown are as for model above, as applicable.

Mounting Surface for Model Types SG307-F Valve can be positioned in 90_ steps around axis, and dependent on space for electrical connector. 2 holes tapped M5 or #10-24UNC, or equivalent (user’s option) Port connection to pressure switch, Ø5 (0.2 dia) max.

Adjustment knob


With knurled handknob adjuster and keylock SG307-F-V2-AS-H2-***-B SG307-F-V2-AS-H2-***-S Dimensions/data not shown are as for model above, as applicable.


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44 (1.73) bolt circle dia. Flat surface, 40 x 40 (1.6 x 1.6), clean and free from burrs.

Stacking Adaptor Blocks Allows type SG307 switches to be incorporated into Vickers SystemStak assemblies. Functional Symbols A

P P

T

B

B

A

P

DGMP-3-P-*-1*

T

B

A

P

DGMP-3-A-*-1*

Installation Dimensions

Ø4,0 (0.15 dia) x 4,25 (0.16) deep for orientation pin

A

46,0 (1.8)

A

B

C

40,0 (1.57)

44 (1.73) bolt circle dia.

3,5 (0.14) Ø3,0 (0.12 dia)

40,5 (1.59)

View on “A” (port “A” end of block) for model types: DGMP-3-P-*-1* DGMP-3-A-*-1* View on “B” (port “B” end of block) for model type: DGMP-3-B-*-1*

P B 31,0 (1.22)

B

2 holes tapped according to model type: DGMP-3-*-B-1*: M5 x 10 deep DGMP-3-*-S-1*:#10-24UNC x 0.4I deep

76,0 (3.0)

Switch as installed on face “A” (model type SG307-F shown). In all cases, valves can be positioned in 90_ steps around axis, and dependent on space for electrical connector.

T

DGMP-3-B-*-1*

31,75 (1.25)

A T

Through ports Ø7,0 (0.27 dia) 4 off O-seals supplied View on “C”

Ø5,5 (0.21 dia) through for 4 mounting bolts

Ordering Procedure

Spare Parts

Specify full model code for pressure switches and for stacking adaptor blocks.

No spare parts are available for products shown in this catalog.

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